html{
    position: relative;
}
body{
    background-color: #f8f8f8;
    user-select: none;
}
.head{
    border-bottom: 1px solid #aec7ec;
}

/* 粒子效果 */
.banner{
    position: relative;
}
.banner-mask{
    text-align: center;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .9);

}
.banner-mask >div{
    padding-top: 144px;
    color: #fff;
}
.banner-mask >div p:nth-child(2){
    margin: 16px 0;
}

/* 主体部分 */
/* 左边 */

.leftCase{
    width: 1096px;
}
.leftCase .case{
    padding-top: 30px;
}
.leftCase .case h4{
    font-size: 18px;
    color: #000;
    font-weight: bold;
}
.leftCase .case h4::after{
    content: '';
    display: block;
    width: 17px;
    height: 2px;
    background-color: #1271ef;
    margin-top: 12px;
}
.leftCase .case h4 span{
    font-size: 10px;
    color: #999;
    margin-left: 5px;
}
.case ul{
    margin-top: 10px;
}
.case ul li{
    width: 352px;
    height: 340px;
    border: 1px solid #eee;
    box-sizing: border-box;
    padding: 10px;
    margin-right:20px;
    float: left;
}
.case ul li:nth-child(3n){
    margin-right:0;
}
.case ul li img{
    width: 100%;
}
.case ul li h5{
    font-size: 18px;
    margin:30px 0 12px;
    color: #000;
}
.case ul li p{
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
    margin-bottom: 20px;
    font-size: 12px;
}
.leftCase .partners>div{
    padding-top: 10px;
}
.leftCase .partners a{
    display: block;
    width: 352px;
    line-height: 116px;
    background-color: #fff;
    text-align: center;
    margin: 0 20px 20px 0;
    float: left;
}
.leftCase .partners a:nth-child(3n){
    margin-right: 0;
}
.rightNav{
    position: absolute;
    top:350px;
    left:50%;
    margin-left:568px;
    margin-top: 77px;
    width: 100px;
}
.rightNav p{
    position: relative;
}

.rightNav a{
    display: block;
    color: #000;
    margin-bottom: 25px;
}
.rightNav i.active{
    position: absolute;
    left: -13px;
    top:9px;
    display: inline-block;
    width: 8px;
    height:3px;
    background-color: #1271ef;
    vertical-align: middle;
    margin-right: 5px;
}
/* .rightNav a.active::before{
    content: '';
    display: inline-block;
    width: 8px;
    height:3px;
    background-color: #1271ef;
    
    
 
} */